Copper Replacement Agate – Keweenaw Peninsula, Michigan
A striking Copper Replacement Agate featuring a well-defined copper structure surrounded by delicate banding. Soft layers of cream, and warm peach tones create a natural pattern that took millions of years to form within ancient volcanic rock.
Copper Replacement Agates are among the most sought-after agates from Michigan's Keweenaw Peninsula, formed when copper-rich mineral solutions replaced portions of the original agate structure. The result is a gemstone found nowhere else in the world quite like this.
This specimen displays exceptional formation and Coller. It’s an excellent addition to any Lake Superior agate, Michigan mineral, or copper country collection.
Collected and cut in Michigan's Copper Country.